Zn/N double-doped titanium monoxide material and preparation method thereof

A titanium monoxide and double doping technology, applied in the field of photocatalytic materials, can solve the problems of photocatalyst wavelength absorption and poor activity, and achieve the effect of simple preparation process and high scientific research value

Active Publication Date: 2020-08-21
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improve photocatalyst wavelength absorption, poor activity and other issues

Method used

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  • Zn/N double-doped titanium monoxide material and preparation method thereof
  • Zn/N double-doped titanium monoxide material and preparation method thereof
  • Zn/N double-doped titanium monoxide material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment provides a Zn / N double-doped titanium monoxide material, which contains Ti, C, N, Zn, and O elements.

[0025] The above-mentioned Zn / N double-doped titanium monoxide material (Zn / N-TiO) preparation method specifically includes the following steps:

[0026] Dissolve polyacrylonitrile in N,N-dimethylformamide, then add titanium dioxide (P25) and stir for 10 hours, then add zinc nitrate to the above solution and stir for 16 hours, then take an oil bath until the liquid is completely evaporated, where The molar ratio of polyacrylonitrile, titanium dioxide (P25) and zinc nitrate is 2:1:3, and the oil bath temperature is 180°C. The solid obtained in the oil bath was placed in a tube furnace, kept at 800°C for 4 hours under the condition of ammonia gas, and then lowered to room temperature, and a Zn / N double-doped titanium monoxide material was obtained. The doping ratio of Zn was 3%, and the doping ratio of N is 8%.

[0027] Using a field emission scanning ...

Embodiment 2

[0030] This embodiment provides an N-doped titanium monoxide material containing Ti, C, N, and O elements.

[0031] The above-mentioned N-doped titanium monoxide material (N-TiO) preparation method specifically comprises the following steps:

[0032] Polyacrylonitrile is dissolved in N, N-dimethylformamide, then add titanium dioxide (P25) and stir after 10 hours, oil bath until liquid is completely volatilized, wherein the molar ratio of polyacrylonitrile, titanium dioxide (P25) is 2: 1. The temperature of the oil bath is 180°C. The solid obtained in the oil bath was placed in a tube furnace, kept at 800° C. for 4 hours under the condition of ammonia gas, and then lowered to room temperature to obtain N-doped titanium monoxide material.

[0033] The products Zn / N-TiO@C and N-TiO@C obtained in Example 1 and Example 2 were tested respectively by using an X-ray diffractometer (model: Burker-AXS D8, manufacturer: Bruker Company, Germany), and the results are shown in Fig. As sho...

Embodiment 3

[0036] The obtained Zn / N double-doped titanium monoxide material was tested for photocatalytic reduction of carbon dioxide.

[0037] Take by weighing 10mg of the Zn / N-TiO prepared by the above-mentioned Example 1 and the N-TiO photocatalyst prepared by Example 2 respectively in a sample bottle, and add 10mL of an aqueous solution of triethanolamine (the aqueous solution of triethanolamine, by volume ratio Calculate, where triethanolamine: water is 1:4), then control the power to 60W, the frequency is 40KHz to conduct ultrasound for 10min, after exhausting through the vacuum pump, fill in carbon dioxide gas to 80kpa, after a period of time, place it in a 300W xenon lamp (with 400 or 700nm cut-off filter) for carbon dioxide reduction test. The role of triethanolamine is as a sacrificial agent for sacrificing holes, thereby facilitating the combination of electrons and carbon dioxide to generate carbon monoxide, methane and ethane.

[0038] Use gas chromatography (model: GC7900,...

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Abstract

The invention relates to a Zn / N double-doped titanium monoxide material and a preparation method thereof. The preparation method comprises the following steps: (1) dissolving polyacrylonitrile in N, N-dimethylformamide, adding titanium dioxide, performing stirring, and then adding zinc nitrate and stirring together; and (2) heating until the liquid is completely volatilized, carrying out high-temperature treatment on the obtained solid under the condition of ammonia gas, and cooling to obtain the Zn / N double-doped titanium monoxide material. Compared with the prior art, the Zn / N co-doped metaloxide material has the advantage that the photocatalytic performance of the Zn / N co-doped metal oxide material is effectively improved by combining the strong oxidation bridge effect among the metaloxide, carbon and heteroatoms.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to a Zn / N double-doped titanium monoxide material and a preparation method thereof. Background technique [0002] In recent years, due to a series of climate problems caused by the combustion of fossil fuels, the development of renewable energy has become urgent. Converting carbon dioxide into hydrocarbons is the most effective way to solve the current greenhouse effect and energy crisis. Currently, compared with high-energy-demanding CO2 capture and geological storage, CO2 conversion or reuse appears to be an attractive, long-term viable and promising avenue to simultaneously address energy and environmental issues. Among the current technologies for converting carbon dioxide, solar energy and heterogeneous photocatalysts are used to convert H 2 O and CO 2 Transform into products of higher economic value, mimic natural photosynthesis, and perfectly realize the production of solar fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/004Y02P20/133
Inventor 闵宇霖江华时鹏辉范金辰徐群杰朱晟
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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